金泉寺滑坡破坏机理及冲击强度定量分析
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摘要
为了对滑坡冲击强度进行定量预测,以勉县金泉寺滑坡为研究对象,基于颗粒流离散元方法,结合对滑坡岩土体细观参数的双轴试验标定,构建了滑坡数值模型,对滑坡的变形破坏机理及其动力学过程进行了分析,选用冲击距离、冲击速度、冲击力3个指标对滑坡的冲击强度大小进行了定量预测。研究结果表明:金泉寺滑坡坡脚和滑坡后缘首先发生变形,然后滑坡坡体中部的锁固段发生贯通,并最终表现为前拉后推的复合式破坏特征;滑坡最大冲击距离为23. 52 m,最大冲击速度为4. 10 m/s,单位宽度最大冲击力为205 kN。相关结论与利用已有研究方法分析所得结论较为一致,认为滑坡运动过程中滑体内部颗粒碰撞及摩擦耗能对滑坡冲击强度的影响不可忽略。研究方法及成果对堆积层滑坡动力学过程分析及其风险定量评估研究具有重要的参考意义。
In order to the quantitative study and predict for the landslide impact intensity,by taking Jinquan Temple landslide in Mian County as the research object,the mesoscopic parameters of rock and soil mass of the landslide were obtained by biaxial test calibration method. Then,based on the discrete element method of particle flow,the landslide numerical model was constructed to simulate the deformation and failure process of the landslide,and the impact intensity of the single landslide was characterized by the impact distance,the velocity and the impact force. The results show that the slope foot and rear edge of Jinquan Temple landslide deform first,and then the whole slope appears as a compound failure characteristic of pulling forward and pushing back after the middle locking section of the slope is penetrated. The impact distance of landslide is 23. 52 m,the maximum impact velocity is 4. 10 m/s,the impact force decreases linearly with the increase of impact distance,and the maximum impact force per unit width is 205 kN,some conclusions are in good agreement with those obtained by using existing research methods. It is considered that the influence of particle collision and friction energy can not be ignored in the process of landslide movement. The research methods and results have important reference significance for kinetic analysis and quantitative risk assessment of landslide.
In order to the quantitative study and predict for the landslide impact intensity,by taking Jinquan Temple landslide in Mian County as the research object,the mesoscopic parameters of rock and soil mass of the landslide were obtained by biaxial test calibration method. Then,based on the discrete element method of particle flow,the landslide numerical model was constructed to simulate the deformation and failure process of the landslide,and the impact intensity of the single landslide was characterized by the impact distance,the velocity and the impact force. The results show that the slope foot and rear edge of Jinquan Temple landslide deform first,and then the whole slope appears as a compound failure characteristic of pulling forward and pushing back after the middle locking section of the slope is penetrated. The impact distance of landslide is 23. 52 m,the maximum impact velocity is 4. 10 m/s,the impact force decreases linearly with the increase of impact distance,and the maximum impact force per unit width is 205 kN,some conclusions are in good agreement with those obtained by using existing research methods. It is considered that the influence of particle collision and friction energy can not be ignored in the process of landslide movement. The research methods and results have important reference significance for kinetic analysis and quantitative risk assessment of landslide.
引文
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14吴越,刘东升,李硕洋.基于滑体与受灾体共同作用的冲击能计算模型[J].岩石力学与工程学报,2012,31(A01):2636-2643Wu Yue,Liu Dongsheng,Li Shuoyang.Shock energy calculation model based on the interaction of slider and disaster object[J].Journal of Rock Mechanics and Engineering,2011,31(A01):2636-2643
15周博,汪华斌,赵文锋,等.黏性材料细观与宏观力学参数相关性研究[J].岩土力学,2012,33(10):3171-3175Zhou Bo,Wang Huabin,Zhao Wenfeng,et al.Study on the correlation between micro-scope and macro mechanical parameters of adhesive materials[J].Geotechnical Mechanics,2012,33(10):3171-3175
16董启朋,姚海林,詹永祥.基于颗粒流模型的颗粒材料宏---细观力学研究[J].人民长江,2016,47(4):68-73Dong Qipeng,Yao Hailin,Zhan Yongxiang.Study on macro-fine mechanics of particulate materials based on particle flow model[J].People Changjiang,2016,47(4):68-73
17赵洲.陕南山区县域滑坡灾害风险管理研究[D].西安:西安科技大学,2012Zhao Zhou.Study on risk management of landslide disaster at county level in mountainous area of southern Shaanxi[D].Xi'an:Xi'an University of Science and Technology,2012
18 Noda E.Water waves generated by landslides[J].Journal of Water Waves and Coastal Engineering,1970,96(4):836-855
19 Scheidegger A E.On the prediction of the reach and velocity of catastrophic landslides:2F,1T,14R.ROCK MECHANICS,V5,N4,1973,P231-236[J].International Journal of Rock Mechanics&Mining Sciences&Geomechanics Abstracts,1974,11(3):65-65
20吴越,刘东升,周忠浩.考虑滑动过程内部崩解耗散的滑坡体运动模型[J].岩土工程学报,2015,37(1):35-46Wu Yue,Liu Dongsheng,Zhou Zhonghao.Mobility assessment model for landslide mass considering disintegration energy consumption in slipping process[J].Chinese Journal of Geotechnical Engineering,2015,37(1):35-46
2张俊,殷坤龙,王佳佳,等.三峡库区万州区滑坡灾害易发性评价研究[J].岩石力学与工程学报,2016,35(2):284-296Zhang Jun,Yin Kunlong,Wang Jiajia,et al.Study on the susceptibility to landslide hazard in Wanzhou district of the Three Gorges Reservoir area[J].Journal of Rock Mechanics and Engineering,2016,35(2):284-296
3 Haugen E D,Kaynia,A M.Vulnerability of structures impacted by debris flow[C]//Tenth International Symposium on Landslides and Engineered Slopes.London:Taylr&Francis Group,2008:381-387
4 Fell R,Corominas J,Bonnard C,et al.Guidelines for landslid e susceptibility hazard and risk zoning for land-use planning[J].Engineering Geology,2008,102(3/4):85-98
5廖军,董谦,钱小龙,等.基于UDEC的高位滑坡运动参数影响因素[J].科学技术与工程,2018,18(34):29-36Liao Jun,Dong Qian,Qian Xiaolong,et al.Influencing factors of movement parameters of high landslide based on UDEC[J].Science Technology and Engineering,2018,18(34):29-36
6 Bianchini S,Cigna F,Casagli N.Assessing the state of activity and intensity of slow moving landslides by means of RADARSAT Persistent Scatterer Interferometry Northern Calabria(Italy)case study[J].Geophysical Research Abstracts,2011,(13):83-90
7 Hungr O.Some methods of landslide hazard intensity mapping in landslide risk assessment[M].Balkema:Rotterdam,1997:215-226
8 Cardinali M,Reichenbach P,Guzzetti F,et al.A geomorphological approach to the estimation of landslide hazards and risks in Umbria Central Italy[J].Natural Hazards and Earth System Sciences,2002,2(1/2):57-72
9吴树仁,石菊松,王涛,等.地质灾害活动强度评估的原理、方法和实例[J].地质通报,2009,28(8):1127-1137Wu Shuren,Shi Jusong,Wang Tao,et al.Principles methods and examples of intensity assessment of geological hazards[J].Geological Bulletin,2009,28(8):1127-1137
10马崇武,刘忠玉,苗天德,等.高速滑坡活动强度预测的一种新方法探讨[J].兰州大学学报,2001(1):93-96Ma Chongwu,Liu Zhongyu,Miao Tiande,et al.A new method for predicting the activity intensity of high speed landslide[J].Journal of Lanzhou University,2001(1):93-96
11薛强,张茂省,孙萍萍,等.基于多期DEM和滑坡强度的滑坡风险评估[J].地质通报,2013(6):925-934Xue Qiang,Zhang Maosheng,Sun Pingping,et al.Landslide risk assessment based on multistage DEM and landslide strength[J].Geological Bulletin,2013(6):925-934
12吴越,刘东升,李明军.滑体下滑及冲击受灾体过程中的能耗规律模型试验[J].岩石力学与工程学报,2011,30(4):693-701Wu Yue,Liu Dongsheng,Li Mingjun.Model test of energy consumption regimes during sliding and impact on the affected body[J].Journal of Rock Mechanics and Engineering,2011,30(4):693-701
13吴越,刘东升,李明军.岩体滑坡冲击能计算及受灾体易损性定量评估[J].岩石力学与工程学报,2011,30(5):901-909Wu Yue,Liu Dongsheng,Li Mingjun.Calculation of landslide impact energy and quantitative assessment of vulnerability of the affected bodies[J].Journal of Rock Mechanics and Engineering,2011,30(5):901-909
14吴越,刘东升,李硕洋.基于滑体与受灾体共同作用的冲击能计算模型[J].岩石力学与工程学报,2012,31(A01):2636-2643Wu Yue,Liu Dongsheng,Li Shuoyang.Shock energy calculation model based on the interaction of slider and disaster object[J].Journal of Rock Mechanics and Engineering,2011,31(A01):2636-2643
15周博,汪华斌,赵文锋,等.黏性材料细观与宏观力学参数相关性研究[J].岩土力学,2012,33(10):3171-3175Zhou Bo,Wang Huabin,Zhao Wenfeng,et al.Study on the correlation between micro-scope and macro mechanical parameters of adhesive materials[J].Geotechnical Mechanics,2012,33(10):3171-3175
16董启朋,姚海林,詹永祥.基于颗粒流模型的颗粒材料宏---细观力学研究[J].人民长江,2016,47(4):68-73Dong Qipeng,Yao Hailin,Zhan Yongxiang.Study on macro-fine mechanics of particulate materials based on particle flow model[J].People Changjiang,2016,47(4):68-73
17赵洲.陕南山区县域滑坡灾害风险管理研究[D].西安:西安科技大学,2012Zhao Zhou.Study on risk management of landslide disaster at county level in mountainous area of southern Shaanxi[D].Xi'an:Xi'an University of Science and Technology,2012
18 Noda E.Water waves generated by landslides[J].Journal of Water Waves and Coastal Engineering,1970,96(4):836-855
19 Scheidegger A E.On the prediction of the reach and velocity of catastrophic landslides:2F,1T,14R.ROCK MECHANICS,V5,N4,1973,P231-236[J].International Journal of Rock Mechanics&Mining Sciences&Geomechanics Abstracts,1974,11(3):65-65
20吴越,刘东升,周忠浩.考虑滑动过程内部崩解耗散的滑坡体运动模型[J].岩土工程学报,2015,37(1):35-46Wu Yue,Liu Dongsheng,Zhou Zhonghao.Mobility assessment model for landslide mass considering disintegration energy consumption in slipping process[J].Chinese Journal of Geotechnical Engineering,2015,37(1):35-46